Catalyst for purifying the exhaust gases of internal combustion

Details Catalyst for purifying the exhaust gases of internal combustion Catalyst for purifying the exhaust gases of internal combustion

1991-01-31

1993-01-12

Shine, W. J.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502304, 4232135, B01J 2104, B01J 2106, B01J 2310, B01J 2389

Patent

active

051790599

ABSTRACT:
A catalyst for purifying the exhaust gases of internal combustion engines with improved light-off behavior and improved durability with reduced specific noble-metal content is disclosed which uses active aluminum oxide provided with customary promoters as carrier and platinum and/or palladium and rhodium in customary amounts as noble metals. In addition, it contains one or more base metals in amounts up to 5 times the mass of the total noble metal which are brought into the immediate vicinity of the rhodium by means of a special manufacturing technique.

REFERENCES:
patent: 4294726 (1981-10-01), Bozon et al.
patent: 4367162 (1983-01-01), Fujitani et al.
patent: 4753915 (1988-06-01), Vogt et al.

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